FINDINGS: Increasingly patients and providers are interested in using remote monitoring devices to help with their health care. The researchers sought to determine if these devices could be useful in preventing 180-day all-cause hospital readmissions for heart failure patients. They enrolled 1437 patients from UCLA, UC Davis, UC Irvine, UC San Diego, UC San Francisco, and Cedars-Sinai Medical Center in Los Angeles who were randomized into two groups.